Snip from one of Wayne's post ,post #14 this thread.
The only Charger I have which reads IR is a Hyperion EOS0610iNET which is a great charger but not very good at measuring IR. It reads between 150 and 250% of the IR I measure, varying with pack size and other factors which I cannot quantify. So much so that I quickly gave it up as a measurement source.
IMO sadly most chargers do a very poor job of reading IR and even the ones which do a decent job of this ,provide numbers without supplying the necessary education on how to interpret and apply these numbers.
FYI Some of the statements made concerning IR ( Ri ) by some of the LiPoly vendors ,chargers and IR reading devices are so lame that they are funny.
A recnt post of mine comparing some IR readings